Function Block - ABB Relion Technical Manual

Section 7
Impedance protection
7.2.3
160
All three zones can be individually definite time delayed.
A load encroachment characteristic is available for the third zone as shown in figure 65.
jX
Operation area Operation area
Operation area
No operation area No operation area
IEC07000117-2-en.vsd
IEC07000117 V2 EN
Figure 65: Load encroachment influence on the offset mho Z3 characteristic

Function block

ZGCPDIS (21G)
I3P* TRIP
V3P* TRZ1
BLOCK TRZ2
BLKZ TRZ3
LDCND PICKUP
PU_Z1
PU_Z2
Z3_PU
ANSI10000122-2-en.vsd
ANSI10000122 V2 EN
Figure 66: ZGCPDIS (21G) function block
R
1MRK 502 048-UUS A
Technical manual